A mass shooting shook Midtown Manhattan on Monday evening, leaving four dead—including an NYPD officer. The gunman, 27-year-old Shane Tamura from Hawaii, opened fire inside a skyscraper near Grand Central using an AR-15-style rifle. Wearing body armor, Tamura gunned down victims before dying by suicide on the 33rd floor. Authorities recovered weapons and meds from his vehicle. A former Las Vegas casino guard with a history of mental illness, Tamura’s motive remains unclear. Investigations are ongoing into this tragic attack.